Logo Fondazione Rinascimento Digitale

di Emanuele Bellini*, Chiara Cirinnà*, Maurizio Lunghi*, Ernesto Damiani**, Cristiano Fugazza**

Fondazione Rinascimento Digitale*

Information Technology Dept. Università di Milano**



Il Paper, in lingua inglese, presenta una nuova architettura per un sistema di Persistent Identifiers basati su URN in Italia. E' descritto un approccio distribuito per implementare un sistema di namespace NBN e illustrata la soluzione adottata per l'assegnazione e risoluzione degli identificatori con la richiesta di invio gerarchica e peer-to-peer. A partire dalle motivazioni centrali dei 'persistent identifiers' per gli oggetti digitali, si presenta lo stato dell'arte delle tecnologie PI, degli standard e delle inizitive, come altre implementazioni NBN. Il prototipo è ancora in fase di sviluppo e viene presentato il prossimo step, in particolare è descritta la prospettiva di interoperabilità già parzialmente prevista per il prototipo NBN.


Relazione tenuta a iPRES 2008, Londra, 29-30 settembre 2008, pubblicata in iPRES 2008 Proceedings, pp. 55-65.


>> vai al Progetto: NBN (National Bibliography Number)


Tipologia documento: Paper

Progetto: NBN (National Bibliography Number)

Evento: Conferenza

Argomento: Persistent Identifier

Persistent identification of Internet resources is an important issue within the life cycle approach to cultural and scientific digital library applications, not only to identify a resource in a trustable and granted way, but also to guarantee continuous access to it. It is well-known that Internet resources have a short average life; their identification and persistent location poses complex challenges affecting both technological and organizational issues, involving access and citation of cultural and scientific resources. The use of URLs can not be considered a reliable approach due to the structural instability of links (ex. domains no longer available) and related resources relocation or updating.


The current use of the URL approach increases the risk of losing cultural documents or under-using available cultural collections. The issue is more organisational than technical. There are already some initiatives aiming at stabilising Internet addresses, for example setting up a central registry with a Persistent identifiers solution stable reference/name of a resource with a redirect to the actual URL. But for us this is simply not enough. In the Cultural Heritage (CH) domain it is essential not only to identify a resource but also to guarantee authenticity, credibility and continuous access to it.


In synthesis, a first essential component in realising a ‘long-term availability’ is the use of Persistent Identifiers (PI) in order to solve the problem of univocal identification and reliable locator of Internet resources. But another key component to implement a PI service is the credibility and long term sustainability of the Registration Authority, the institution that stands security for the maintenance of the PI-URL association register, and granting for the resource authenticity, completeness and the content accessibility. Another element to be taken in consideration creating a name space for any type of resources is the level of service and ‘granularity’ that the identifiers are requested by the specific user application.

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Scarica il Paper:

Persistent Identifiers distributed system for Cultural Heritage digital objects [file .pdf 225 KB]


Relazione tenuta a iPRES 2008, Londra, 29-30 settembre 2008, pubblicata in iPRES 2008 Proceedings http://www.bl.uk/ipres2008/ipres2008-proceedings.pdf pp. 55-65.


Data di inserimento: 30/09/2008
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